User guide

96 Advanced User Guide
4 Chromatographic Checkout
Sulfur performance
12 Install the sulfur filter and filter spacer.
13 Make the following method parameter changes.
14 Ignite the FPD flame if not lit.
15 Display the signal output and monitor. This output typically
runs between 50 and 60 but can be as high as 70. Wait for the
output to level off. This takes approximately 1 hour.
If the baseline output is too high:
• Check column installation. If installed high, the stationery
phase burns out and increases measured output.
• Check for leaks.
• Bake out the detector and column at 250 °C.
• Wrong flows set for installed filter.
If the baseline output is zero, verify the electrometer is on
and the flame is lit.
16 If using a data system, prepare the data system to perform
one run using the loaded checkout method. Make sure that
the data system will output a chromatogram.
17 Start the run.
If performing an injection using an autosampler, start the
run using the data system or press [Start] on the GC.
Noise 1.6 to 3.0 ≤4
Half-width (min) 0.05 to 0.07 —
Output 34 to 80 ≤80
Table 15 Sulfur method parameters (S)
Parameter Value ( mL/min)
H
2
flow 50
Air flow 60
Table 14 Evaluating checkout runs
FPD P filter Typical range after 24
hours
Limits at installation